Spicy sprouts, such as broccoli, arugula, or leek, give sushi rolls a delicate crunch and peppery flavor. A sushi mat makes it easy to wrap the nori and rice tightly around fillings, but it’s not necessary.
Note: This recipe calls for moderately ripe plantains. Look for ones that have mottled yellow-black skins, avoiding those with green skins (which are unripe) or black skins (which are too ripe). You may have to visit a...